Exploiting Gaussian steering to probe non-Markovianity due to the interaction with a structured environment

• URL: http://arxiv.org/abs/2104.12243v1
• Date: Sun, 25 Apr 2021 20:06:09 GMT
• Title: Exploiting Gaussian steering to probe non-Markovianity due to the interaction with a structured environment
• Authors: Massimo Frigerio, Samaneh Hesabi, Davood Afshar, and Matteo G. A. Paris
• Abstract summary: We employ the proposed measure to assess and compare the non-Markovianity of a quantum Brownian motion (QBM) channel. We show that sub-Ohmic, high temperature environments lead to highly non-Markovian evolution. Our results add to the understanding of the interplay between quantum correlations and non-Markovianity for CV systems.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We put forward a measure based on Gaussian steering to quantify the non-Markovianity of continuous-variable (CV) Gaussian quantum channels. We employ the proposed measure to assess and compare the non-Markovianity of a quantum Brownian motion (QBM) channel, originating from the interaction with Ohmic and sub-Ohmic environments with spectral densities described by a Lorentz-Drude cutoff, both at high and low temperatures, showing that sub-Ohmic, high temperature environments lead to highly non-Markovian evolution, with cyclic backflows of Gaussian steerability from the environment to the system. Our results add to the understanding of the interplay between quantum correlations and non-Markovianity for CV systems, and could be implemented at the experimental level to quantify non-Markovianity in some physical scenarios.

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